Fig. 1. Schematic design of the wedge splitting mediumwave infrared Fizeau interferometer

Fig. 2. Return error of the interference system. (a) Return error diagram of the reflective collimating optical interference system; (b) Return error of the reflective and transmissive collimating optical path interference system

Fig. 3. Schematic diagram of the optical path of the wedge beam splitter wavefront simulation

Fig. 4. Optimal wedge beam splitter angle $w_{\text{best}}$ curves for different collimator F# and tilt angles of the wedge beam splitter T

Fig. 5. Wavefront PV curve of the plate beam splitter and wedge beam splitter interference system at different tilt angles of the beam splitter T

Fig. 6. Wavefront PV curve of the wedge beam splitter interference system. (a) Relationship between wavefront PV of wedge beam splitter interferometric system and collimator F#; (b) Relationship between wavefront PV of wedge beam splitter interferometric system and tilt angle of wedge beam splitter T

Fig. 7. Relationship curve between the optimal wedge beam splitter angle $w_{\text{best}}$, wavefront PV of wedge beam splitter interference system and the focal length of the collimator

Fig. 8. Illumination path of the wedge splitting medium wave infrared Fizeau interferometer

Fig. 9. Design results of the collimator. (a) PV of collimated wavefront for the collimator at 0° field of view; (b) PV of collimated wavefront for the collimator at 0.1° field of view; (c) Angular aberration of the normalized exit aperture for the collimator at 0° field of view

Fig. 10. Monte carlo simulation tolerance analysis of the collimator

Fig. 11. Image quality evaluation of the interferometer imaging optical path. (a) Imaging wavefront PV of the normalized field; (b) MTF curve; (c) Distortion curve

Fig. 12. Monte carlo simulation tolerance analysis of the interferometer imaging optical path

Fig. 13. Stray light analysis diagram of the wedge beam splitter. (a) Schematic diagram of stray light introduced by reflection fromthe front and rear surfaces of the wedge beam splitter; (b) Light traces at the aperture diaphragm surface

Fig. 14. Retrace error of wedge splitting medium wave infrared Fizeau interferometer